remcos | 20ba461023a3e0451f84770af4f5670b036d1634d2d6c3b805d87805279a945b

General

Target

PRE-ALERT ==HTHC22031529.exe
Size

17KB
MD5

fcded46d7cc1ab298a281734e1eab2dc
SHA1

1e0122d610831396d1a470ad762bd804a67ae9d9
SHA256

20ba461023a3e0451f84770af4f5670b036d1634d2d6c3b805d87805279a945b
SHA512

532531a6489dba3a68b93df74ba9cd4a6d19f64295f9638760df178e709e48087c06a7dc85d6707ba656119e9d5940993350ac41ef12f6fbf6d86102169080a3

Score

10^/10

remcos remotehost persistence rat

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

172.111.234.100:5888

Attributes

audio_folder
MicRecords
audio_record_time
5
connect_delay
0
connect_interval
1
copy_file
remcos.exe
copy_folder
Remcos
delete_file
false
hide_file
false
hide_keylog_file
false
install_flag
false
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
remcos
mouse_option
false
mutex
Rmc-IY2SFS
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
startup_value
Remcos
take_screenshot_option
false
take_screenshot_time
5

Signatures

Remcos
Remcos is a closed-source remote control and surveillance software.
rat remcos

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

PRE-ALERT ==HTHC22031529.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-3440072777-2118400376-1759599358-1000\Software\Microsoft\Windows\CurrentVersion\Run\Rikgglmmk = "\"C:\\Users\\Admin\\AppData\\Roaming\\Tzkhxxxi\\Rikgglmmk.exe\""	PRE-ALERT ==HTHC22031529.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

PRE-ALERT ==HTHC22031529.exe

description pid process target process

PID 976 set thread context of 384 976 PRE-ALERT ==HTHC22031529.exe InstallUtil.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082
Suspicious behavior: EnumeratesProcesses 3 IoCs

Processes:

powershell.exePRE-ALERT ==HTHC22031529.exe

pid process

1372 powershell.exe
976 PRE-ALERT ==HTHC22031529.exe
976 PRE-ALERT ==HTHC22031529.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

PRE-ALERT ==HTHC22031529.exepowershell.exe

description pid process

Token: SeDebugPrivilege 976 PRE-ALERT ==HTHC22031529.exe
Token: SeDebugPrivilege 1372 powershell.exe

description	pid	process	target process
PID 976 set thread context of 384	976	PRE-ALERT ==HTHC22031529.exe	InstallUtil.exe

pid	process
1372	powershell.exe
976	PRE-ALERT ==HTHC22031529.exe
976	PRE-ALERT ==HTHC22031529.exe

description	pid	process
Token: SeDebugPrivilege	976	PRE-ALERT ==HTHC22031529.exe
Token: SeDebugPrivilege	1372	powershell.exe

Suspicious use of WriteProcessMemory 20 IoCs

Processes:

PRE-ALERT ==HTHC22031529.exe

description	pid	process	target process
PID 976 wrote to memory of 1372	976	PRE-ALERT ==HTHC22031529.exe	powershell.exe
PID 976 wrote to memory of 1372	976	PRE-ALERT ==HTHC22031529.exe	powershell.exe
PID 976 wrote to memory of 1372	976	PRE-ALERT ==HTHC22031529.exe	powershell.exe
PID 976 wrote to memory of 1372	976	PRE-ALERT ==HTHC22031529.exe	powershell.exe
PID 976 wrote to memory of 384	976	PRE-ALERT ==HTHC22031529.exe	InstallUtil.exe
PID 976 wrote to memory of 384	976	PRE-ALERT ==HTHC22031529.exe	InstallUtil.exe
PID 976 wrote to memory of 384	976	PRE-ALERT ==HTHC22031529.exe	InstallUtil.exe
PID 976 wrote to memory of 384	976	PRE-ALERT ==HTHC22031529.exe	InstallUtil.exe
PID 976 wrote to memory of 384	976	PRE-ALERT ==HTHC22031529.exe	InstallUtil.exe
PID 976 wrote to memory of 384	976	PRE-ALERT ==HTHC22031529.exe	InstallUtil.exe
PID 976 wrote to memory of 384	976	PRE-ALERT ==HTHC22031529.exe	InstallUtil.exe
PID 976 wrote to memory of 384	976	PRE-ALERT ==HTHC22031529.exe	InstallUtil.exe
PID 976 wrote to memory of 384	976	PRE-ALERT ==HTHC22031529.exe	InstallUtil.exe
PID 976 wrote to memory of 384	976	PRE-ALERT ==HTHC22031529.exe	InstallUtil.exe
PID 976 wrote to memory of 384	976	PRE-ALERT ==HTHC22031529.exe	InstallUtil.exe
PID 976 wrote to memory of 384	976	PRE-ALERT ==HTHC22031529.exe	InstallUtil.exe
PID 976 wrote to memory of 384	976	PRE-ALERT ==HTHC22031529.exe	InstallUtil.exe
PID 976 wrote to memory of 384	976	PRE-ALERT ==HTHC22031529.exe	InstallUtil.exe
PID 976 wrote to memory of 384	976	PRE-ALERT ==HTHC22031529.exe	InstallUtil.exe
PID 976 wrote to memory of 384	976	PRE-ALERT ==HTHC22031529.exe	InstallUtil.exe

C:\Users\Admin\AppData\Local\Temp\PRE-ALERT ==HTHC22031529.exe
"C:\Users\Admin\AppData\Local\Temp\PRE-ALERT ==HTHC22031529.exe"
1⤵
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:976

C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -enc UwB0AGEAcgB0AC0AUwBsAGUAZQBwACAALQBTAGUAYwBvAG4AZABzACAANAA=
2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1372

C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
2⤵
PID:384

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

memory/384-69-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/384-71-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/384-64-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/384-66-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/384-78-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/384-77-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/384-61-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/384-62-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/384-74-0x0000000000431BE8-mapping.dmp

Download
memory/384-79-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/384-67-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/384-68-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/384-73-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/976-55-0x0000000076631000-0x0000000076633000-memory.dmp

Filesize
8KB

Download
memory/976-54-0x0000000000ED0000-0x0000000000EDA000-memory.dmp

Filesize
40KB

Download
memory/976-56-0x000000000D2D0000-0x000000000D4DC000-memory.dmp

Filesize
2.0MB

Download
memory/1372-60-0x000000006F4B0000-0x000000006FA5B000-memory.dmp

Filesize
5.7MB

Download
memory/1372-59-0x000000006F4B0000-0x000000006FA5B000-memory.dmp

Filesize
5.7MB

Download
memory/1372-57-0x0000000000000000-mapping.dmp

Download

Analysis

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